Next week beta testers of Windows Vista are expecting to receive a new build of Microsoft's next-generation operating system.  Neowin is reporting that this week, a leak of that build has begun making its way through the net.  Build 5231 may not have all the features in the official October build, it does have a new build of Internet Explorer and an enhanced Media Player skin.

Read the whole story, complete with screenshots, over at Neowin.net